I just noticed that my Norton is saying, first, "activate" when it is already activated. Then, it tells me it could not communicate with Norton Internet Security and last that I need to download and re-install. Well, folks, your directions don't quite fit a Mac. I have tried to re-install and nothing happens. It doesn't go into Applications and I'm left with nothing that says "install." Was this written for Windows?
You seem to have been able to install Norton on your system, so you must have gotten the Mac version.
I have asked your post be moved to the Mac board where more Mac users may better help you.